CN216885018U

CN216885018U - Core pulling structure and injection mold

Info

Publication number: CN216885018U
Application number: CN202123178620.9U
Authority: CN
Inventors: 朱文展; 陈丹; 张佰伦
Original assignee: Tonly Electronics Holdings Ltd
Current assignee: Tonly Electronics Holdings Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-07-05
Anticipated expiration: 2031-12-15

Abstract

The utility model discloses a core pulling structure and an injection mold, wherein the core pulling structure is applied to the injection mold, the injection mold comprises a mold main body and a fixed base plate, a forming cavity for forming an injection product is formed in the mold main body, the injection product is provided with a side pulling hole, the mold main body can move towards or away from the direction of the fixed base plate, the mold main body is provided with a first slide way and a second slide way which are communicated, the core pulling structure comprises a fixed column and an inclined needle, the fixed column is connected with the fixed base plate and is inserted into the first slide way, the inclined needle is connected with one end of the fixed column, which is far away from the fixed base plate, and is inserted into the second slide way, and one end of the inclined needle, which is far away from the fixed column, can be inserted into or separated from the side pulling hole of the injection product when the mold main body moves. The application provides a structure of loosing core simple structure, preparation convenience can effectively reduce injection mold's volume to reduce injection mold cost of manufacture.

Description

Core pulling structure and injection mold

Technical Field

The utility model relates to the technical field of injection molds, in particular to a core pulling structure and an injection mold.

Background

In injection molding, due to the requirement of certain product structures, normal demolding cannot be realized, and an inclined core-pulling structure is required to realize core pulling. The existing inclined core pulling structure mostly adopts an oil cylinder to drive a core body to move or adopts a mechanical core pulling mechanism, a driving element for driving is arranged outside a mold, the driving element is required to be connected with various transmission structures arranged in the mold to realize core pulling, and the inclined core pulling structure arranged in the manner makes the design of the internal structure of the mold complicated.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a core pulling structure, aiming at simplifying the structure of a mould.

In order to achieve the above purpose, the core pulling structure provided by the utility model is applied to an injection mold, the injection mold comprises a mold main body and a fixed base plate, a forming cavity for producing an injection product is arranged in the mold main body, the injection product is provided with a side pulling hole, the mold main body can move towards or away from the direction of the fixed base plate, the mold main body is provided with a first slide way and a second slide way which are communicated with each other, and the core pulling structure comprises:

the fixing column is connected with the fixing base plate and is inserted into the first slide way; and

the inclined needle is connected to one end, departing from the fixed base plate, of the fixed column and inserted into the second slide way, and one end, departing from the fixed column, of the inclined needle can be inserted into or separated from the side drawing hole of the injection molding product when the mold main body moves.

Optionally, the definition the mould main part deviates from the direction that fixed backing plate removed is the moving direction, first slide is followed the moving direction extends the setting, the second slide with the moving direction is the contained angle setting.

Optionally, a first engaging groove is formed in a side surface of the fixed column, and a partial structure of the oblique needle is inserted into the first engaging groove and can move along a groove sidewall of the first engaging groove in a direction in which the first engaging groove is concavely formed;

and/or a second clamping groove is formed in the side surface of the inclined needle, and part of the fixing column is inserted into the second clamping groove and can move along the groove side wall of the second clamping groove in the direction of the concave forming of the second clamping groove.

Optionally, when the first engaging groove is formed in the side surface of the fixing column, the direction of the concave forming of the first engaging groove is perpendicular to the extending direction of the oblique needle;

when the side surface of the oblique needle is provided with the second clamping groove, the concave forming direction of the second clamping groove is vertical to the extending direction of the oblique needle.

Optionally, a first step surface is formed in the second slideway, and the oblique needle includes:

the main body section is provided with one end connected with the fixing column and the other end capable of being inserted into or separated from the side drawing hole of the injection molding product when the mold main body moves; and

the boss is formed on the outer surface of the main body section, and the surface of the boss facing the side drawing hole can abut against the first step surface.

Optionally, a second step surface is further formed in the second slideway, and the second step surface is located on one side, facing the side drawing hole, of the first step surface;

the core pulling structure further comprises an elastic piece, the elastic piece is arranged in the second slide way, and two opposite ends of the elastic piece are abutted to the second step surface and the boss respectively.

Optionally, the core pulling structure further includes: the guide block, the guide block with the mould main part is connected, the guide block is equipped with the guiding hole, the axis in guiding hole is followed the extending direction setting of oblique needle, partial structure of oblique needle wears to locate in the guiding hole.

Optionally, the guide block comprises:

a mounting body connected with the mold body;

the guide part, the guide part with the installation main part is connected, and the shutoff the second slide with the one end of first slide intercommunication, the guiding hole is located the guide part, the boss can with the guide part orientation the surface butt of second slide one side.

Optionally, the cross section of the inclined needle is increased from the injection molding product to the fixing column.

The utility model also provides an injection mold, comprising: mould main part, fixed bolster and structure of loosing core, the mould main part can move towards or deviate from fixed bolster direction removes, is equipped with the one-tenth die cavity that is used for producing injection moulding product in the mould main part, injection moulding product is equipped with the side and takes out the hole, the mould main part is equipped with first slide and the second slide that is linked together, the structure of loosing core includes:

the inclined needle is connected to one end, deviating from the fixed base plate, of the fixed column and inserted into the second slide way, and one end, deviating from the fixed column, of the inclined needle can be inserted into or separated from the side drawing hole of the injection molding product when the mold main body moves.

The technical scheme of the utility model provides a core pulling structure which is applied to an injection mold and used for side core pulling of injection molding products. The injection mold comprises a mold main body and a fixed base plate, the core pulling structure comprises a fixed column and an inclined needle, the fixed column is connected with the fixed base plate, and the fixed column and the inclined needle are inserted into a first slide and a second slide which are formed by the mold main body respectively. When the injection mold is opened, the mold main body moves towards the direction deviating from the fixed base plate, at the moment, the fixed column slides the opposite mold main body along the first slide way, and drives the inclined needle to slide in the second slide way relative to the mold main body, and the inclined needle can be separated from the side pulling hole of the injection product, so that the side pulling core of the injection product is completed. The application provides a loose core structure can utilize injection mold self demoulding structure to provide the power of side loosing core, and simple structure, preparation are convenient, can effectively reduce injection mold's volume to reduce injection mold cost of manufacture. And the injection molding product can be more simply, conveniently and quickly removed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an injection mold according to an embodiment of the present invention;

fig. 2 is a partially enlarged view of a portion a shown in fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1000	Injection mould	200	Die main body
100	Core pulling structure	200a	First slideway
				10	Fixing column	200b	First step surface
10a	First engaging groove	200c	Second step surface
				11	Fixing main body	200d	Second slideway
12	Clamping block	200e	Abdication gap
				20	Oblique needle	51	Movable backing plate
20a	Second engaging groove	52	Slide bit
				21	Main body segment	53	Core insert
22	Boss	54	Male template
				30	Elastic piece	55	Mother template
40	Guide block	300	Fixed backing plate
				41	Mounting body	400	Injection molded product
42	Guide part	400a	Side draw hole
				42a	Guide hole

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that all directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions relating to "first", "second", etc. in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the expression "and/or" as used throughout is meant to encompass three juxtaposed aspects, exemplified by "A and/or B", including either the A aspect, or the B aspect, or aspects in which both A and B are satisfied. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The oblique core pulling structure in the related art is used for driving a driving element for pulling the core to be arranged outside the mold, the driving element is required to be connected with various transmission structures arranged in the mold to pull the core, and the oblique core pulling structure arranged in the related art enables the inner structure of the mold to be complex in design and high in manufacturing cost.

In order to solve the above problems, the present invention proposes an injection mold 1000, see fig. 1 and 2. In fig. 1 and 2, a indicates a direction in which the mold body 200 can move toward the fixed mat 300, and b indicates a direction in which the mold body 200 moves away from the fixed mat 300, i.e., a moving direction.

The injection mold 1000 includes a mold main body 200, a fixed pad 300, and a core pulling structure 100. The mold body 200 is provided therein with a molding cavity for producing the injection molded product 400, and the produced injection molded product 400 is provided with a side draw hole 400 a. The mold body 200 can move toward or away from the fixed pad 300, and the mold body 200 is provided with a first slide 200a and a second slide 200d which are communicated with each other.

Specifically, the mold body 200 includes a movable pad 51, a slide 52, a core insert 53, a core plate 54, a cavity plate 55, and the like. Wherein, the molding cavity is enclosed by a slide 52 and a core insert 53.

It can be understood that the side draw-out hole 400a is a hole of the injection product 400, whose hole axis is deviated from the mold opening direction of the injection mold 1000. The side drawing hole 400a provided in the injection molding product 400 may be an inner side drawing hole 400a, and may also be an outer side drawing hole 400a, which may be specifically set according to requirements, and is not further limited herein. When the side draw hole 400a is the inside draw hole 400a, the first slide way 200a is formed by the movable backing plate 51 and the male mold plate 54, and the second slide way 200d is formed by the slide 52. When the side draw hole 400a is the outside draw hole 400a, the first slide way 200a is formed by the movable backing plate 51 and the male mold 54, and the second slide way 200d is formed by the slide 52 and the male mold 54. It will be appreciated that the first runner 200a and the second runner 200d are channels for ease of molding.

When the side draw hole 400a is the outside draw hole 400a, the first slideway 200a and the second slideway may be directly communicated, or: an abdication gap 200e is formed between the row 52 and the core 53, and the first slide 200a is communicated with the second slide 200d through the abdication gap 200 e.

Referring to fig. 1 and 2, the present invention further provides a core pulling structure 100, where the core pulling structure 100 includes a fixing column 10 and an inclined pin 20, the fixing column 10 is connected to the fixing pad 300 and is inserted into the first slide 200a, the inclined pin 20 is connected to one end of the fixing column 10 away from the fixing pad 300 and is inserted into the second slide 200d, and one end of the inclined pin 20 away from the fixing column 10 can be inserted into or separated from the side pulling hole 400a of the injection molding product 400 when the mold main body 200 moves.

The inclined needle 20 is connected to the end of the fixing column 10, so that the fixing column 10 can be arranged in the first slide way 200a in a larger range and limited by the first slide way 200a, and the moving stability of the fixing column 10 is improved.

The first slide way 200a is a track for the fixed column 10 to move, and the fixed column 10 may be at least partially inserted into the first slide way 200 a. The second slide way 200d is a track for the inclined needle 20 to move, and at least part of the structure of the inclined needle 20 is inserted in the second slide way 200 d. In an embodiment, the fixing column 10 may be partially inserted into the first sliding channel 200a, and partially exposed in the clearance 200e to be connected to the bevel needle 20. In the above embodiment, the inclined needle 20 may be partially inserted into the second sliding channel 200d, and partially exposed in the clearance 200e to be connected to the fixing post 10. When the mold main body 200 moves away from the fixed base plate 300, the inclined pins 20 connected to the fixed columns 10 are drawn out of the side drawing holes 400a and further move into the abdicating gaps 200 e. It can be understood that the first slide way 200a is communicated with the second slide way 200d through the abdicating gap 200e, so that the connecting end of the oblique needle 20 and the fixed column 10 can move better, and the structure is prevented from being locked.

The direction in which the mold main body 200 moves away from the fixed cushion plate 300 is defined as a moving direction, and the first slide way 200a and the second slide way 200d may be disposed at an included angle with the moving direction, that is, disposed at a position deviating from the moving direction. For example, the first and

second ramps

200a and 200d may be disposed offset from the direction of movement and extend in the same direction. At this time, one end of the oblique needle 20 connected with the fixing column 10 may be fixedly connected, and the fixing column 10 may be movably connected with the fixing pad 300 through a slide rail or the like. It can be understood that the fixing base plate 300 can drive the fixing column 10 and the inclined pin 20 to move, and the fixing column 10 and the fixing base plate 300 are movably connected to avoid the structure from being locked, and reduce the stress between the core-pulling structure 100 and the mold main body 200.

In order to make the structure more compact and improve the stability of the bevel needle 20 from the side drawing hole 400a, in one embodiment, the first slide 200a may be extended along the moving direction, and the second slide 200d may be deviated from the moving direction. At this time, the fixing post 10 may be fixedly coupled with the fixing pad 300. So set up and can also prevent that fixed column 10 and fixed backing plate 300 from breaking away from and influencing the reliability of loosing core, improve the operation of loosing core. The fixed column 10 is movably connected to the inclined needle 20, so that the structure can be prevented from being clamped, the stress between the core pulling structure 100 and the mold main body 200 is reduced, and the loss of the injection mold 1000 is reduced. In this embodiment, the direction and the angle of deviation of the second chute 200d can be set as required, so that when the mold main body 200 deviates from the fixed cushion plate 300 and moves, the inclined pin 20 can move by a corresponding distance, which is not further limited herein. For example, when the mold body 200 is moved 10mm away from the fixed pad 300, the inclined pins 20 may be moved 9mm toward the withdrawal-side withdrawal hole 400 a.

In addition, it should be noted that the "end portion" referred to in the present application is not limited to the end surface, but may be understood as a segment of a structure adjacent to the end surface.

The technical scheme of the utility model provides a core pulling structure 100, and the core pulling structure 100 is applied to an injection mold 1000 and is used for performing side core pulling on an injection molding product 400 formed by injection molding. The injection mold 1000 comprises a mold main body 200 and a fixed cushion plate 300, the core pulling structure 100 comprises a fixed column 10 and an inclined needle 20, the fixed column 10 is connected with the fixed cushion plate 300, and the fixed column and the inclined needle 20 are respectively inserted into a first slide way 200a and a second slide way 200d formed by the mold main body 200. When the injection mold 1000 is opened, the mold main body 200 moves in a direction away from the fixed base plate 300, at this time, the fixed column 10 slides the mold main body 200 along the first slide way 200a, drives the inclined needle 20 to slide in the second slide way 200d relative to the mold main body 200, and enables the inclined needle 20 to be separated from the side core-pulling hole 400a of the injection product 400, thereby completing the side core-pulling of the injection product 400. The application provides a structure of loosing core 100 can utilize injection mold 1000 self demoulding structure to provide the power of side core pulling, and simple structure, preparation are convenient, can effectively reduce injection mold 1000's volume to can let injection moulding product 400 deviate from more portably swift.

The application provides a loose core structure 100 can apply to in the accurate injection mold to production in-band detain injection moulding product 400 that is difficult for deviating from. The application provides a structure of loosing core 100 structural design is novel, compact structure, manufacturing convenience, has extensive usage. The core pulling of the side core pulling hole 400a of the injection molding product 400 is safe and reliable, the automatic production of the injection molding product 400 can be realized, and the production cost of the similar products can be effectively reduced by simplifying the mold structure and reducing the demolding force.

It can be understood that, when the first slide way 200a is disposed to extend along the moving direction and the second slide way 200d is disposed to deviate from the moving direction, the fixing post 10 may be fixedly connected to the fixing pad 300, where the fixing post 10 may be integrally formed and fixed by a bolt or a screw to be integrally connected to the fixing pad 300. In this embodiment, the fixing post 10 may be connected to the fixing pad 300 by a bolt or a screw for easy manufacturing and installation.

The inclined needle 20 may be connected to the end of the fixed column 10 by an elastic element such as a spring or elastic glue, or the inclined needle 20 may be connected to the end of the fixed column 10 by a chain.

In an embodiment of the present application, the inclined needle 20 and the fixing post 10 may also be directly connected by a snap-fit movement. For example, a first engagement groove 10a is provided on a side surface of the fixed column 10, and a part of the oblique pin 20 is inserted into the first engagement groove 10a and is movable in a direction in which the first engagement groove 10a is formed to be recessed along a groove sidewall of the first engagement groove 10 a.

In the above embodiment, the surface of the bevel needle 20 may be convexly provided with a first inserting sheet, and the first inserting sheet is inserted into the first card and the groove. When the mold body 200 moves away from the fixed pad 300, the fixed column 10 connected to the fixed pad 300 is fixed, and the inclined pin 20 is driven by the fixed column 10 to move along the second slide 200d relative to the mold body 200, so as to draw out the side draw hole 400 a. At this time, the first insertion piece abuts against the groove side wall of the first engagement groove 10a, and moves from the groove bottom wall of the first engagement groove 10a in the notch direction without being separated from the first engagement groove 10 a.

In order to ensure the accuracy of the direction when the inclined needle 20 is drawn out of the side drawing hole 400a, the core pulling effect is improved. When the first engaging groove 10a is formed on the side surface of the fixing column 10, the direction in which the first engaging groove 10a is recessed (i.e., the direction indicated by c in fig. 2) is perpendicular to the extending direction of the inclined pin 20. That is, when the fixed column 10 applies a pulling force in the direction from the mold body 200 to the fixed bolster 300 to the oblique needle 20, the pulling force is double-translated in the direction in which the oblique needle 20 moves along the second slide 200d and in the direction in which the oblique needle 20 moves from the groove bottom wall of the first engaging groove 10a to the notch direction. The arrangement can improve the transmission efficiency of the force between the fixed column 10 and the inclined needle 20 and improve the effect of drawing the inclined needle 20 out of the side drawing hole 400 a.

In another embodiment, the fixed column 10 may not have the first engaging groove 10a, but have a second engaging groove 20a on the side of the oblique needle 20, and a part of the fixed column 10 is inserted into the second engaging groove 20a and can move along the side wall of the second engaging groove 20a in the direction in which the second engaging groove 20a is formed in a concave manner. Similarly, at this time, the end of the fixing column 10 may be provided with a second inserting sheet, and the second inserting sheet may be movably inserted into the second engaging groove 20 a. Similarly, in order to ensure the direction accuracy when the bevel needle 20 is pulled out of the side pulling hole 400a and improve the core pulling effect, when the second engaging groove 20a is formed on the side surface of the bevel needle 20, the direction in which the second engaging groove 20a is concavely formed (i.e., the direction indicated by d in fig. 2) is perpendicular to the extending direction of the bevel needle 20.

Referring to fig. 2, in an embodiment of the present application, a first engaging groove 10a is formed on a side surface of one end of the fixed column 10 connected to the oblique needle 20, a second engaging groove 20a is formed on a side surface of one end of the oblique needle 20 connected to the fixed column 10, a portion of an end of the oblique needle 20 is inserted into the first engaging groove 10a, and a portion of an end of the fixed column 10 is inserted into the second engaging groove 20 a. So set up, can also simplify structure 100 of loosing core, the structure 100 of loosing core of being convenient for is made and processed to can improve the intensity of fixed column 10 and oblique needle 20 self structure, avoid oblique needle 20 to insert the partial structure in first block groove 10a and the main part section 21 fracture of oblique needle 20, can avoid fixed column 10 to insert the partial structure in second block groove 20a and fixed main part 11 fracture.

In order to facilitate the forming process, the groove side walls on two opposite sides of the first engaging groove 10a and the second engaging groove 20a penetrate through the fixing column 10. The opposite sides refer to opposite sides in a direction perpendicular to the cross section as in fig. 2. This is to ensure that the first engagement groove 10a has opposite side groove side walls for the oblique needle 20 to abut against and move in the extending direction of the fixed column 10. And ensure that the second clamping groove 20a has two opposite side walls for the fixed column 10 to abut against and move in the extending direction of the inclined needle 20.

Referring to fig. 2, the fixing post 10 may include a fixing body 11 and an engaging block 12, and the fixing body 11 and the engaging block 12 enclose to form a first engaging groove 10 a. In the direction from the bottom wall of the first engaging groove 10a toward the notch, the depth of the groove side wall where the first engaging groove 10a formed by the engaging piece 12 and the oblique pin 20 abut is defined as H1, and the depth of the groove side wall where the first engaging groove 10a formed by the fixing body 11 is defined as H2, H1 < H2. Therefore, when the inclined needle 20 moves relative to the fixed column 10, the projection of the inclined needle in the moving direction is in the first slide way 200a, so that the space formed in the mold main body 200 for the movement of the core pulling structure 100 can be reduced, and the mold main body 200 is more compact in structure. Of course, in order to further make the structure of the mold main body 200 more compact, when the inclined needle 20 moves relative to the fixed column 10, the projection of the inclined needle 20 in the moving direction is always in the first slide way 200 a.

Referring to fig. 2, in an embodiment of the present invention, a first step surface 200b is formed in the second slide 200d, the inclined pin 20 includes a main body 21 and a boss 22, one end of the main body 21 is connected to the fixing post 10, the other end of the main body can be inserted into or separated from the side drawing hole 400a of the injection molding product 400 when the mold main body 200 moves, the boss 22 is formed on an outer surface of the main body 21, and a surface of the boss 22 facing the side drawing hole 400a can abut against the first step surface 200 b.

It is understood that the second slideway 200d may comprise a plurality of hole segments, wherein the hole diameters of two adjacent hole segments are different to form the first step surface 200 b. Alternatively, in other embodiments, a protrusion may be provided in the second slide way 200d to form the first step surface 200 b. When the mold main body 200 moves toward the fixed base plate 300, the main body segment 21 will drive the boss 22 to move toward the injection molding product 400. When the inclined needle is moved to the right position, the boss 22 is abutted to the first step surface 200b, so that the inclined needle 20 is limited by the boss 22, and the inclined needle 20 is prevented from continuously moving to influence the molding effect of the injection molding product 400.

Referring to fig. 2, in an embodiment of the present application, a second step surface 200c is further formed in the second sliding channel 200d, and the second step surface 200c is located on a side of the first step surface 200b facing the side drawing hole 400 a; the core pulling structure 100 further includes an elastic member 30, the elastic member 30 is disposed in the second slide 200d, and two opposite ends of the elastic member 30 abut against the second step surface 200c and the boss 22, respectively.

The elastic member 30 may be a spring or an elastic sleeve. When the slant pin 20 is inserted into the side drawing hole 400a, the elastic member 30 is in a compressed state. When the mold main body 200 moves away from the fixed base plate 300, the inclined needle 20 can be pulled by the fixed column 10 to be drawn out of the side drawing hole 400a, and the elastic piece 30 can also apply thrust to the inclined needle 20 through the boss 22 so as to further provide power for the inclined needle 20 to be drawn out of the side drawing hole 400a, thereby improving the drawing-out efficiency. In the present embodiment, an end of the bevel needle 20 away from the second step surface 200c abuts against the boss 22, so that the structure of the bevel needle 20 can be simplified, and the bevel needle 20 can be manufactured and processed conveniently. This also means that when the slanting needle 20 is inserted into the side draw-out hole 400a, the elastic member 30 will be abutted and restrained between the first step surface 200b and the second step surface 200 c. It is understood that, in other embodiments, the surface of the bevel needle 20 may be provided with other structures to abut against an end of the elastic member 30 away from the second step surface 200c, so as to ensure that the elastic member 30 can push the bevel needle 20 to move.

In order to limit the deformation direction of the elastic member 30, the elastic member 30 may abut against the inner side wall of the second slide 200 d.

It is understood that the second step surface 200c may be formed by different hole diameters of the two hole segments. Alternatively, it may be a raised formation provided in the second runner 200 d. In order to facilitate the machining of the slide 52 to form the second slideway 200d, in this embodiment, the first step surface 200b and the second step surface 200c are both formed by hole sections with different apertures. So, second slide 200d is at least partly can with the big or small adaptation of oblique needle 20 to further spacing oblique needle 20's moving direction, guarantee the effect of loosing core, improve the shaping rate of product.

Referring to fig. 2, in an embodiment of the present application, the core back structure 100 further includes a guide block 40, the guide block 40 is connected to the mold main body 200, the guide block 40 is provided with a guide hole 42a, an axis of the guide hole 42a is arranged along an extending direction of the inclined pin 20, and a part of the structure of the inclined pin 20 is inserted into the guide hole 42 a.

To facilitate structural attachment, the guide block 40 is attached to the row 52. The guide block 40 is arranged to guide the inclined needle 20 to move, so that the moving stability of the inclined needle 20 is improved, and the inclined needle 20 is prevented from shaking to damage the injection molding product 400.

Referring to fig. 2, in an embodiment of the present application, the guide block 40 includes a mounting body 41 and a guide portion 42, the mounting body 41 is connected to the mold body 200, the guide portion 42 is connected to the mounting body 41 and blocks one end of the second slide 200d communicating with the first slide 200a, the guide hole 42a is provided in the guide portion 42, and the boss 22 can abut against a surface of the guide portion 42 facing the second slide 200 d.

When the inclined needle 20 is drawn out of the side draw-out hole 400a, the boss 22 moves from the first step surface 200b toward the guide portion 42, and can abut against the surface of the guide portion 42 on the side toward the second slide path 200d during movement. It can be understood that, by plugging the end of the first slide 200a connected to the second slide 200d by the guiding portion 42, the distance that the slant pin 20 is drawn out of the side drawing hole 400a can be limited, the slant pin 20 is prevented from being damaged or separated from the second slide 200d due to the excessive structure that the slant pin 20 is drawn out of the second slide 200d, and the slant pin 20 can be prevented from colliding with the mold main body 200 due to the excessive structure that the slant pin is drawn out of the second slide 200 d.

In order to facilitate the connection and installation of the installation body 41 and the slide 52 and to facilitate the machining of the guide hole 42a, the surface of the guide block 40 facing away from the bevel needle 20 may be inclined in a direction perpendicular to the extending direction of the bevel needle 20. In order to further limit the moving range of the inclined needle 20 when the mold main body 200 moves towards the fixed backing plate 300, the end surface of the fixed column 10 departing from the fixed backing plate 300 can abut against the surface of the guide block 40 departing from the inclined needle 20.

In order to improve the stability of the connection and installation of the guide block 40 and the row 52, the row 52 is formed with an installation groove into which the installation body 41 is inserted, see fig. 2.

In an embodiment of the present application, the cross section of the inclined needle 20 increases from the injection molded product 400 to the fixing post 10.

The cross section of the angled needle 20 can be understood as the cross section of the main body section 21. The main body segment 21 may be gradually increased from the injection molded product 400 toward the fixing post 10. Alternatively, the main body section 21 may be divided into a plurality of sections, each section having an increasing cross section in a direction toward the fixing post 10 of the injection molded product 400. The cross section of the oblique needle 20 is increased, so that the structural strength of the oblique needle 20 can be enhanced, and the oblique needle 20 is prevented from being deformed or even damaged when moving.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, which are directly or indirectly applied to the present invention, are included in the scope of the present invention.

Claims

1. The utility model provides a structure of loosing core, a serial communication port, the structure of loosing core is applied to injection mold, injection mold includes mould main part and fixed backing plate, is equipped with the one-tenth die cavity that is used for producing injection moulding product in the mould main part, injection moulding product is equipped with the side and takes out the hole, the mould main part can move towards or deviate from fixed backing plate direction removes, the mould main part is equipped with first slide and the second slide that is linked together, the structure of loosing core includes:

2. The core pulling structure according to claim 1, wherein a direction in which the mold body moves away from the fixed base plate is defined as a moving direction, the first slide way extends along the moving direction, and the second slide way forms an included angle with the moving direction.

3. The core pulling structure according to claim 2, wherein a first engaging groove is formed in a side surface of the fixed column, and a part of the inclined needle is inserted into the first engaging groove and can move along a groove side wall of the first engaging groove in a direction in which the first engaging groove is concavely formed;

4. The core pulling structure according to claim 3, wherein when the first clamping groove is formed in the side surface of the fixing column, the direction in which the first clamping groove is concavely formed is perpendicular to the extending direction of the inclined pin;

5. The core pulling structure according to claim 1, wherein a first step surface is formed in the second slideway, and the inclined pin comprises:

the main body section is connected with the fixing column at one end, and the other end of the main body section can be inserted into or separated from the side drawing hole of the injection molding product when the mold main body moves; and

the boss is formed on the outer surface of the main body section, and the surface of one side, facing the side drawing hole, of the boss can abut against the first step surface.

6. The core pulling structure as claimed in claim 5, wherein a second step surface is further formed in the second slideway, and the second step surface is located on one side, facing the side pulling hole, of the first step surface;

7. The core pulling structure of claim 5, further comprising:

the guide block, the guide block with the mould main part is connected, the guide block is equipped with the guiding hole, the axis in guiding hole is followed the extending direction setting of oblique needle, partial structure of oblique needle wears to locate in the guiding hole.

8. The core pulling structure of claim 7, wherein the guide block comprises:

a mounting body connected with the mold body;

9. The core pulling structure according to any one of claims 1 to 8, wherein the cross section of the inclined needle is increased from the injection molding product to the fixing column.

10. An injection mold, comprising:

a mold main body, a fixed bolster, and a core back structure according to any one of claims 1 to 9.